What are the specs for this Transformer?

The correct replacement for ICP model WPG3424090LKC1 — 208/230V to 24V 40VA | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your ICP equipment which lists the model number WPG3424090LKC1 — 208/230V to 24V 40VA | Ships Today.

ICP

ICP Transformer for WPG3424090LKC1 — 208/230V to 24V 40VA | Ships Today

Name: ICP Transformer for WPG3424090LKC1 — 208/230V to 24V 40VA | Ships Today
Brand: ICP
SKU: 1178431
Price: 41.60 USD
Availability: InStock

SKU: 1178431 Brand: ICP

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Overview

This OEM control transformer steps the 208/230V line voltage on your ICP WPG3424090LKC1 system down to the 24V control voltage that runs the thermostat, ignition control, contactor coil, and gas valve. Rated at 40VA, it supplies the low-voltage power the entire control circuit depends on. When a transformer fails, the unit goes completely dead on the control side — no call for heat or cool will energize anything, the thermostat may go blank, and you will often find a blown low-voltage fuse or burnt secondary winding. A buzzing, overheating, or open-winding transformer is a common no-heat / no-cool culprit. Includes the 24V barrier (part 1178431) used with this transformer assembly.

Specifications

Spec	Value
Part Number	1173691 (TRANS), 1178431 (24V Barrier)
Type	Control Transformer
Brand	ICP / Heil / Tempstar
Primary Voltage	208 / 230V
Secondary Voltage	24V
Rating	40 VA
Fit	OEM Replacement

Compatibility

Direct-fit OEM replacement for the ICP / Heil / Tempstar / Comfortmaker WPG3424090LKC1 packaged unit. Also fits many ICP-family models that use the 208/230V-to-24V 40VA control transformer. Verify your existing transformer's VA and voltage ratings before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter at the transformer terminals.
Access — Remove the control/blower access panel to reach the control box.
Document — Photograph all primary and secondary wire connections before disconnecting.
Remove — Label and disconnect the primary (line) and secondary (24V) leads, then unbolt the transformer from the control panel.
Install — Mount the new transformer, reconnect the primary taps for your supply voltage (208 or 230V) and the 24V secondary leads per your photo.
Test — Restore power and confirm 24V across the secondary terminals and normal system operation.

Signs You Need a Replacement

No 24V control voltage — system completely dead on the low-voltage side
Repeatedly blown low-voltage fuse or tripped breaker
Audible buzzing, overheating, or a burnt smell from the transformer
Open or shorted winding when checked with a multimeter

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

ICP Transformer for WPG3424090LK...

$41.60

Frequently Asked Questions

Does this Transformer fit my ICP WPG3424090LKC1 — 208/230V to 24V 40VA | Ships Today?

Yes. This is the factory-specified OEM transformer for the ICP WPG3424090LKC1 — 208/230V to 24V 40VA | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the transformer on my ICP WPG3424090LKC1 — 208/230V to 24V 40VA | Ships Today?

Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Photo wiring connections. Step 3: Disconnect wires from old transformer. Step 4: Remove mounting hardware. Step 5: Install new transformer, reconnect wires matching voltage ratings. Step 6: Verify 24V output with multimeter.

My thermostat has no power. What failed?

Thermostat with no display = failed 24V transformer (or blown control board fuse). Check the 3A/5A fuse on the control board first ($1–$5 fix). If fuse is good but no 24V output from transformer, replace transformer.

Is this transformer compatible with Bryant or Payne too?

Many ICP parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my ICP transformer?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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